Oh, I also read in a website about certain herbs that shouldn't be taken or used. I did not recognize most of them except for
flax seed
oregano (if taken in large amounts)
thyme (if taken in large amounts)
there's a whole bunch of them and for different reasons, but I just recognized those.
They say to pay attention to what tea you are drinking as teas usually contain a strong amount of whatever it is made of. Just make sure you know which one you are taking and that it's safe for you while pregnant.